An update from me on this.
All my invoices from the same dealer (2 oil, 2 inspection services) state the wrong oil was used. As they are unable to prove otherwise that the right oil was used, they are fixing the car. They offered a contribution to a new car of the retail value of the M in a running condition. I couldn't justify a new car right now, so it looks like LF78184 will be saved after all!

Good to know you’ve got a solution which means you’re not out of pocket.

An update from me on this.
All my invoices from the same dealer (2 oil, 2 inspection services) state the wrong oil was used. As they are unable to prove otherwise that the right oil was used, they are fixing the car. They offered a contribution to a new car of the retail value of the M in a running condition. I couldn't justify a new car right now, so it looks like LF78184 will be saved after all!

Good to know you’ve got a solution which means you’re not out of pocket.

Glad you got it sorted, OP. The fix may actually add to the value of the car in some circles, although you might want to just check what other issues could arise from prolonged use of an incorrect oil grade.

An update from me on this.
All my invoices from the same dealer (2 oil, 2 inspection services) state the wrong oil was used. As they are unable to prove otherwise that the right oil was used, they are fixing the car. They offered a contribution to a new car of the retail value of the M in a running condition. I couldn't justify a new car right now, so it looks like LF78184 will be saved after all!

I am amazed that a dealer has made this offer this early on. I'd have expected you to have had to start legal action and then still fight it.

Best result you could have hoped for in my opinion.

Last edited by Lower on Tue Apr 30, 2019 3:43 pm, edited 1 time in total.

An update from me on this.
All my invoices from the same dealer (2 oil, 2 inspection services) state the wrong oil was used. As they are unable to prove otherwise that the right oil was used, they are fixing the car. They offered a contribution to a new car of the retail value of the M in a running condition. I couldn't justify a new car right now, so it looks like LF78184 will be saved after all!

Good to know you’ve got a solution which means you’re not out of pocket.

An update from me on this.
All my invoices from the same dealer (2 oil, 2 inspection services) state the wrong oil was used. As they are unable to prove otherwise that the right oil was used, they are fixing the car. They offered a contribution to a new car of the retail value of the M in a running condition. I couldn't justify a new car right now, so it looks like LF78184 will be saved after all!

For what it's worth to anyone, Regal Engines in Purfleet Essex. Top quality work. Rebuilt an engine for me and it never missed a beat in 7 years! Small family business. Reground crank, the lot. Admittedly it wasn't a Z but they do all cars.

An update from me on this.
All my invoices from the same dealer (2 oil, 2 inspection services) state the wrong oil was used. As they are unable to prove otherwise that the right oil was used, they are fixing the car. They offered a contribution to a new car of the retail value of the M in a running condition. I couldn't justify a new car right now, so it looks like LF78184 will be saved after all!

Good to know you’ve got a solution which means you’re not out of pocket.

As others have said, for these cars a dealer would be the WRONG place to service or work on your car. The knowledge just isn't there because their focus is on newer models. An indy who primarily works on these older cars is always a better shout. Take the oil situation in this thread, it's just too basic an error, imagine they took the engine apart (top end or bottom end type work), would you really trust them to have it all put together to spec........ I defo wouldn't. In my opinion I'd be more wary about buying a z4m that only has main dealer service history at this sort of age.